Watch



(No Model.)

P. R. GUTTER.

4WATCH.

No. 341,095. Patented May 4, 1886.

UNITED STATES PATENT OEEICE.

WATCH.

FLATION forming part of Letters Patent No. 341,095, dated May 4:, 1886.

Application filed February 4, 1886. Serial No. 190,857. (No model.)

.T0 all when@ it' may concern:

Be it known that l, FREDERIC R. CUTTER, of Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and usel'ul improvement in Vatches, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to a device for an easy adjustment ol the end bearings of the arbor of the balance-wheel of a watch. lt is well known to all watch-makers that it is very nice and sometimes almost weary work to so accurately adjust the end bearings of the balance-arbor that there shall be no more endshake than required for the free movement of the balance-wheeh The object is to obtain the desired result by leaving a kerf either between the upper part ot' the rear portion oi' the balance-cock and its lower part, or between the rear part ot' the balance-cock and the plate to which it is attached. This object l obtain by the mechanism shown in the accompanying drawings, in which- Figure l is a view ot' the rear plate of a watch having my device attached. Fig. 2 is a side elevation ol` a watch, the rear plate of which is exposed, so as to show more clearly the application of my invention; and Fig. 3 is a sect-ion taken on line y i/ ol Fig. l, being very much enlarged, so as to show more clearly the details oi' my invention.

In the drawings, A, Figs. l and 2, represents the outside case of a watch of the ordinary construction, and B one of the plates, said plate being of the construction shown in the accompanying drawings, or of any other usual construction.

My invention does not relate tothe plate of a watch, but solely to the device for adjusting the part or parts that control the endshake of an arbor, E, therefore I need not 'explain in full all the parts of a watch, but shall explain and describe only such parts as form a part of or an adjunct of my invention.

C C is the part that is called the balancecock,77 and is made in the usual manner, except that its rear part, C, has a kei- 1", K, (see Figs. 2 and 3,) said kerl" extending well back into the rear part of the balance-cock, as shown in Fig. 8. The use ot' this kerl' K may be eX- 5o plained as follows: The balancecock C C is` attached to one ofthe plates of the watch by the screw S, Figs. l and 3, and, being kerled. as has already been described, is provided with one or more set-screws located at or near T, Figs. l and 2.

The set-screw T serves simply to gage the opening ol'l the kerf l, while the screw S serves to hold the balancecock to the plate, and also to compress the kerf' K, and thus tend to bring 6o the part C (that is the part that governs the position and end-shake ol' the arbor ofthe balance-wheel) toward or against the end of the arbor; hence by using both screws, respectively, the most infinitesimal movement may be imparted to the part C, that holds the end ol' the arbor ol' the balance-wheel. 'In other words, a perfect adjustment 0l" the parts that control the endshakc may be made with certainty and rapidity.

l claimln a watch, the combination of the kerfed balance-cock C C, having holding and adjusting screws S and T, with plate B and arbor E, all operating together substantially as described, and for the purpose set forth.

FREDERIC R. CUTTER.

\Titnesses:

VTLLTAM EDsoN, FRANK G. PARKER. 

